Service & Technology Information for the sewing industry. Machine Embroidery. variety in form and colour

Transcription

1 Service & Technology Information for the sewing industry Machine Embroidery variety in form and colour

2 Machine Embroidery variety in form and colour For centuries, embroideries have decorated our clothes and home textiles. What used to be laboriously done by hand, is done by a computer controlled machine today. Due to fastpaced embroidering machine and embroidering program developments of recent years, the expectations and requirements for embroidery threads and its applied technology have grown as well. Basic influential factors for well-done embroideries: Digitizer puter by defining colour changes and thread cuts and the movements of the embroidery hoop over x and y coordinates. During embroidered, the thread to be used and the machine type. An embroidery pattern consists of the following stitch types: Running Stitch (row stitch) The embroidery running stitch is the same as the classic two- the individual stitches line up closely and consecutively to each and forth movement of each individual stitch is defined by the running stitch is contouring and stitching fine details on filled areas. Because the running lines are very thin they are also used to connect between embroidered areas to avoid cutting the thread. 1-ply 2-ply 3-ply 4-ply 5-ply Satin stitch type of stitch is very versatile and is one of the most commonly used stitch types. Satin stitches can be either wide or narrow, run straight or curvy. Traditionally the satin stitch has been used for floral motifs, lettering or as a border around filled areas and appliqués. Satin stitches impart the embroidery with a certain type of liveliness when it is stitched in many different directions. the embroidery thread. Satin stitch pattern Fill stitch Areas are filled with dense stitching. The needle penetration points are placed in defined intervals and angles from each other and form either a rhythmic or irregular fill pattern. The distance between the individual stitch lines designates the stitch density. For a complete coverage of the cloth, stitch density must correspond to the thread diametre. Different patterns called stencils provide the fill stitches with structure, for example a Running stitches in different plies Structured fill stitch 2 Service & Technology

3 Underlay stitching Underlay stitching is done before being covered by cover stitches (= satin stitches or fill stitches) in a design. The underlay stitching is usually a running or satin stitch. They are not directly visible but provide stability, volume and exact contours for the embroidery and provide a neat embroidery image. Underlay stitching can have these three functions: Firstly, to lend stability to the cloth and prevent the cloth from stretching providing therefore better embroidery. The second function is to provide a base for the cover stitches, which will then appear more voluminous on the fabric. The third function is the creation of denser appearing the right amount of underlay stitching and corresponding density is important. Basically, the direction of the underlay stitching should be at a different angle than the intended cover stitching to balance out fabric stretch and to avoid single stitches from Following information is required by the digitizer to achieve best results: Size of the finished embroidery Width and height (x and y), since faxed or ed templates can such a case, details must be simplified. Final product and application areas The choice of the stitch is directly connected to the later use: or coats, bags). the centre towards the sides in order to minimise stretch on the the centre to the outside. denim), the main embroidery direction should not be parallel to the structure but at an angle. Embroidery material The underlay stitches are determined by the material to be uneven. stitching must also hold the embroidery together. similar toned colours. Number of colours and needles The number of needles of a machine determines how many colours can be used in a pattern. different directions and overstitching with a looser stitch density. cess, these can be directly assigned to specific needle positions. Thread size / thread quality 60 and 75. ed for the finished part determines the thread raw material (for example polyester, cotton, viscose or metallic thread). properties, it is possible to run all embroideries with only one this. The snap spool gives further possibilities for savings; it prevents the thread from falling off the spool while being stored. - Thread storage with the snap groove 3

4 Embroidery machine machine. All stitches in machine embroidering are produced by movements of the embroidery hoop under the needle. The computer moves the embroidery hoop (as programmed in the embroidery program) in the x and y direction through servo-motors. Stitching speed is variable and can be controlled as required. Embroidery head So many (identical) embroideries can be produced at the same time. The greater the amount of heads, then more the number of needles will be moving at the same time. volume series and for domestic application). Multi-head machines are available from 2 to more than 50 heads. Number of needles per embroidery head The number of needles per embroidery head determines how many colours can be stitched in one pattern without rethreading the machine. changeover times (in the case of model change) and cost (for logistics and the embroidery thread management). ard colours that will be used in most patterns (for example those colours. These need not be changed in case of a pattern change. Embroidery hoop The individual embroidery hoop should be as small as embroidering. The material must be tightly clamped in the in x direction following a circular path (according to the shape of the cap) so that the needle penetrates the material at a right angle always and that the cap is not distorted through fixing in the frame. embroidered emblems. Fortron Barudan Brother 4 Service & Technology

5 Setting the thread tension The needle thread tension is set through the tension controller on the machine head. The bobbin thread tension is controlled through the tension spring on the bobbin case. other needles with the help of a tension meter; this leads to a Toyota Amaya Happy 5

6 Embroidery needles The embroidery needle can have high effect to the quality, the best quality products should be used that are fitting to the needles should be regularly replaced because over time they become blunt and the eye can get rough. The needle is defined by the following parameters: Manufacturers offer additional shapes for special applications. Special embroidery eye is 2 numbers larger in relation to the The optimal point of the embroidery needle should be for - - by the needle. Basically, there are 3 needle point shapes that are roughly assigned to the following applications: Round point: Fabric and leather in order not to perforate the material). possible to prevent damage to the embroidery base, and on the greater influence than the needle point. The following table serves as a needle guide for various Material RG FFG R Needle size Nm Size Needle point Knitwear Medium ball point Small ball point Woven fabric Medium ball point Denim Medium ball point Terry cloth Medium ball point Micro-fibre Normal ball point Medium ball point Leather goods Sharp ball point Sharp ball point Fine leather goods Sharp ball point Thread size Needle system DBxK5 recommended needle size Nm Size Thread size 12 (wool) Thread size 25/30 (viscose, cotton, metallic) Thread size 40 (polyester, viscose, metallic) Thread size 50 (cotton, metallic) Thread size 60 (polyester) Thread size 75 (polyester) 6 Service & Technology

7 Backing material Almost any material can be embroidered better if the mate- stitches would adapt to the material structure. There are different Tear away backing temporary adhesive (which reduces warpage even further) or needs to be fixed in the frame for embroideries. The material to be embroidered is then fixed to it with temporary adhesive; this Freudenberg Cutaway backing order to prevent mesh damage while tearing off the fleece. The left over fleece is cut off after embroidering, for example with dressing scissors (with rounded tips) or with a seam cutter (where one side is protected by a ball to prevent cutting the material). the tips. Also, the cutaway fleece can be fixed to the material with Fused backing lined articles that are embroidered before they are sewn because the interlining also is a suitable embroidery base. Water-soluble backing and films Water-soluble stabilisers can be used everywhere where any embroideries that are to be especially pliable. Usually, water- Heat soluble films and gauze Materials of this type are primarily used in lace embroidery without base materials. After the embroidering process, the lace is will loosen after the embroidery base is removed. Filmoplast adhesive. Filmoplast is fixed in the frame alone, the protective film is removed as necessary and the material for garments are embroidered. After embroidering, the embroidery be closed with a patch of Filmoplast. So, the framed Filmoplast piece can be reused several times. Schneider-Wohlenberg 7

8 Embroidery thread Which embroidery thread is used depends on requirements AMANN embroidery thread range offers convincing solutions: ISACORD 40 - especially recommended for applications with very deman- ISAMET 40 is a metallic embroidery thread based on a polyamide used for embroideries on uniforms but also as brilliant accents in all other embroideries. The range of 35 colours includes not only gold and silver tones but also coloured and mixed variants. shine with a rainbow luster. ISA TEXLIGHT deries on clothes worn in bars, lounges or clubs. ISAFIL 30 and 40 s viscose embroidery thread, is characterised by used for all embroideries where lively colour appearance and deries made with viscoes thread are mechanically less stressable than those made with polyester. Neither are they chlorine fast. Serafil 120/2 and Serafil 200/2 Serafil is specifically suited for filigree embroideries with tiny details. Where small lettering and detailed monograms are needed, this polyester embroidery thread provides the finest embroideries. Serafil is available in 72 colours. 8 Service & Technology

9 Saba C the all- ly detailed wide-spread embroideries with a non-glossy surface, representing animal furs for example. This polyester core-spun thread is chlorine proof and stable to boiling. N-Tech CS 80 and N-Tech CS 70 This thread made from DuPont TM is flame-retardant and self-extinguishing, common requirements in the 14 colours. Rasant Saba Rasant 75 and Rasant 120 As embroidery, this cotton corespun shows a dull, slightly woolly beautiful rustic effects which are extremely resistant and durable. colours. Bobbin Threads AMANN offers a suitable bobbin thread for every application. Depending on technical demands or personal preferences you may choose from a large variety. ISA 150 and ISA 180 Both threads have been specially developed for the use as selfwinding bobbin thread for embroideries. They have an attrac- ISABOB it is used on most embroidery machines. Time and money lengths compared to self-wound bobbins. Saba C 150 required, Saba 150 is used. This well-developed and trusted thread from the sewing thread range is available in 475 colours. deries. 9

10 Embroidering tips in brief Problem Cause Suggested solution Thread breaks Thread jam at the needle Skip stitches Material damage Loopiness Needle thread tension too high Wrong or incompletely threaded Thread guiding elements have sharp edges or show burrs by hitting needle) layers on top of each other Stitching speed too fast for large stitches Unfavourable stitching direction Poor thread quality Needle defective (bent) Needle not set correctly Threading path incorrect Unfavourable stitching direction on difficult base material Wrong needle form used many stitches in the same place Thread tension too low Stitch length too long Unfavourable stitching direction Reset needle thread tension, 125 cn is considered as standard Polish thread paths For especially long stitches reduce machine speed Use branded threads featuring a high tensile strength such as or Reverse stitching direction with underlay stitches if necessary Use brand threads such as or Replace needle been caught somewhere. First try and rotate pattern and base material by 90. Replace needle Select needle point according to material. radiuses, offset penetration points. (usually no more than 7 mm). Reverse stitching direction, if necessary with additional underlay stitches 10 Service & Technology

11 Problem Cause Suggested solution Use smallest possible embroidery hoop Woven material not fixed sufficiently Material around the embroidery shows puckering Uneven embroidery Asynchronous embroidery (outlines) Stiff embroidery Annoying markings from frame in the frame Fleece not firm enough Fabric warps despite fleece Thread tension too high Unfavourable stitching direction Stitch length too long or too short match Underlay stitches missing or do not fulfil their purpose (for example terry cloth, velour or velvet) Thread tension balance incorrect Too much warpage of material in embroidery hoop Warpage not considered in punching process Hoop has loosened Punching fault Delicate material (for example tuft fabrics) fix the material it by using a temporary adhesive avoiding distortion Bond fleece and fabric with a temporary or permanent adhesive in order to further reduce warpage. and embroidering the material offset by 90 ). program. stitch density accordingly. stitching is recommended for letters while frame-type underlay stitching is recommended for areal embroideries. Note: false underlay stitching is worthless. Applying a water or heat soluble film to the top side prevents Apply warpage compensation in punch program Tighten frame screw further, wrap frame with textile tape for more stability (for example if the outline segment can be offset completely). Wrap inner hoop with textile tape. material itself needs not be framed in the hoops but only the 11

12 Certificate No.: a member of TECHNOLOGY CENTRE AMANN & Soehne GmbH & Co. KG Hauptstrasse Boennigheim - Germany Phone Fax nt@amann.com All facts and figures are intended exclusively for your information. All recommendations presuppose adjustment of the sewing conditions to the appropriate sewing yarn. All data were arranged after best knowledge and certain and correspond to the conditions during printing. For mistakes, misprint and any changes of the instructions no adhesion. All illustrations are noncommittal GB00PDF0210